The Aerodynamic And Dynamic Characteristic Analysis Of 5MW Wind Turbine Blades

The cost of the blade is the highest in the wind turbine. So the comprehensive performance of the blades design is directly related to the wind turbine’s aerodynamic performance and comprehensive performance. This article main research content for the dynamic characteristics of wind turbine blades. Details are as follows:Firstly,the theoretical basis of the fan blades aerodynamic shape is described, the pneumatic model and dynamic stall model is built. the airfoil is established by using software PROFILI, determined airfoil parameters are combined with, the airfoil is imported 3D software UG. Aerodynamic blade three-dimensional models are built.Secondly, the materials and layer of blade is considered, the mechanical properties of composite materials of the blade isanalyzed, in the finite element software ANSYS, parameterized model of blade is established, the modal analysis was carried out on the blade and the whole system.Thirdly, the computational fluid dynamics software FLUENT is used to a three-dimensional simulation of wind turbines in the rotational state of the aerodynamic characteristics, speed changes, changes of pressure distribution and velocity distribution are received, a 3D rotation effect on leaf blade unsteady aerodynamic characteristics is get.Finally, turbulent wind model and aerodynamic loads calculation model is established, we get the normal power conditions, the normal power generation and associated extreme wind shear and wind conditions change, the normal power generation and fault conditions with power and ultimate storm, at a standstill condition wind speed under load changes and blade root.